# The number of molecules in 22.4cm3 of nitrogen gas at STP is a) 6.022×10 to the power 20 b) 6.022×10 to the power 23 c) 22.4×10 to the power 20 d) 22.4×10 to the power 23

In 1 mole of gas ,

the no. of L = 22.4 L = 22.4*1000 cm³. = 22400 cm³.

now for 22.4 cm³ ,

the no. of moles will be

= 22.4/22400 = 0.001

so the no. of molecules will be 0.001*(6.022×10

^{23})

= 6.022×10

^{20}molecules.

Answer is option (a)

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